<template>
<div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <el-alert :closable="false" title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon>
        </el-alert>

        <el-row>
            <el-col>
                <span>选择商品分类：</span>
                <el-cascader expand-trigger="hover" :options="cateList" @change="cateChanged" :props="cateProps" v-model="selectedCateKeys" clearable change-on-select></el-cascader>
            </el-col>
        </el-row>
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <el-tab-pane label="动态参数" name="many">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                <el-table :data="manyTableData" border stripe>
                    <el-table-column type='expand'>
                        <template slot-scope="scope">
                            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                                {{item}}
                            </el-tag>
                            <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)">
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <el-table-column type='index'></el-table-column>
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
                <el-table :data="onlyTableData" border stripe>
                     <el-table-column type='expand'>
                        <template slot-scope="scope">
                            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                                {{item}}
                            </el-tag>
                            <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)">
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <el-table-column type='index'></el-table-column>
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                        <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>

        </el-tabs>
    </el-card>
    <el-dialog :title="'添加'+titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRefs" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>

        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
    </el-dialog>
    <el-dialog :title="'修改'+titleText" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRefs" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>

        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
    </el-dialog>
</div>
</template>

<script>
export default {
    data() {
        return {
            cateList: [],
            cateProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'
            },
            selectedCateKeys: [],
            activeName: 'many',
            manyTableData: [],
            onlyTableData: [],
            addDialogVisible: false,
            addForm: {
                attr_name: ''
            },
            addFormRules: {
                attr_name: [{
                    required: true,
                    message: '请输入参数名称',
                    trigger: 'blur'
                }]
            },
            editDialogVisible: false,
            editForm: {
                attr_name: ''
            },
            editFormRules: {
                attr_name: [{
                    required: true,
                    message: '请输入参数名称',
                    trigger: 'blur'
                }]
            },
            // 控制文本框与按钮的切换显示
            inputVisible: false,
            // 文本框输入的值
            inputValue: ''
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
            const {
                data: res
            } = await this.$http.get('categories')
            if (res.meta.status !== 200) {
                return this.$message.error('获取商品列表失败')
            }
            this.cateList = res.data
        },
        cateChanged() {
            this.getParamsData()
        },
        handleTabClick() {
            this.getParamsData()
        },
        async getParamsData() {
            if (this.selectedCateKeys.length !== 3) {
                this.selectedCateKeys = []
                this.manyTableData = []
                this.onlyTableData = []
                return
            }

            const {
                data: res
            } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                params: {
                    sel: this.activeName
                }
            })
            if (res.meta.status !== 200) {
                return this.$message.error('获取参数列表失败')
            }
            res.data.forEach((item) => {
                item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
                item.inputVisible = false
                item.inputValue = ''
            })
            if (this.activeName === 'many') {
                this.manyTableData = res.data
            } else {
                this.onlyTableData = res.data
            }
        },
        addDialogClosed() {
            this.$refs.addFormRefs.resetFields()
        },
        addParams() {
            this.$refs.addFormRefs.validate(async valid => {
                if (!valid) {
                    return
                }
                const {
                    data: res
                } = await this.$http.post(`categories/${this.cateId}/attributes`, {
                    attr_name: this.addForm.attr_name,
                    attr_sel: this.activeName
                })
                if (res.meta.status !== 201) {
                    return this.$message.error('添加参数失败')
                }
                this.addDialogVisible = false
                this.getParamsData()
            })
        },
        // eslint-disable-next-line camelcase
        async showEditDialog(attr_id) {
            const {
                data: res
            // eslint-disable-next-line camelcase
            } = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
                params: {
                    attr_sel: this.activeName
                }
            })
            if (res.meta.status !== 200) {
                return this.$message.error('获取参数失败')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        editDialogClosed() {
            this.$refs.editFormRefs.resetFields()
        },
        editParams() {
            this.$refs.editFormRefs.validate(async valid => {
                if (!valid) return
                const {
                    data: res
                } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
                    attr_name: this.editForm.attr_name,
                    attr_sel: this.activeName
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('修改参数失败')
                }
                this.$message.success('修改参数成功')
                this.getParamsData()
                this.editDialogVisible = false
            })
        },
        // eslint-disable-next-line camelcase
        async removeParams(attr_id) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消删除参数')
            }
            const {
                data: res
            // eslint-disable-next-line camelcase
            } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除参数失败')
            }
            this.$message.success('删除参数成功')
            this.getParamsData()
        },
        handleInputConfirm(row) {
            if (row.inputValue.trim().length === 0) {
                row.inputValue = ''
                row.inputVisible = false
                return
            }
            row.attr_vals.push(row.inputValue.trim())
            row.inputVisible = false
            this.saveAttrVals(row)
        },
        // 点击按钮，展示文本输入框
        showInput(row) {
            row.inputVisible = true
            // 让文本框自动获取焦点
            // nextTick页面被重新渲染之后会调用
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus()
            })
        },
        handleClose(i, row) {
            row.attr_vals.splice(i, 1)
            this.saveAttrVals(row)
        },
        async saveAttrVals(row) {
            const {
                data: res
            } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
                attr_name: row.attr_name,
                attr_sel: row.attr_sel,
                attr_vals: row.attr_vals.join(' ')
            })
            if (res.meta.status !== 200) {
                this.$message.error('修改参数项失败')
            }
            this.$message.success('修改参数项成功')
        }

    },
    computed: {
        isBtnDisabled() {
            if (this.selectedCateKeys.length !== 3) {
                return true
            }
            return false
        },
        cateId() {
            if (this.selectedCateKeys.length === 3) {
                return this.selectedCateKeys[2]
            }
            return null
        },
        titleText() {
            if (this.activeName === 'many') {
                return '动态参数'
            }
            return '静态属性'
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 10px;
}

.input-new-tag {
    width: 120px;
}
</style>
